Include DDC fixes to dart:html in the main version

tools/dom/idl/dart/dart.idl

Index: tools/dom/idl/dart/dart.idl
diff --git a/tools/dom/idl/dart/dart.idl b/tools/dom/idl/dart/dart.idl
index ffe500f5d1a40bdd649447d04a6f7a43ad7ae381..16fad6d897b03ba2c343c940364059e0d8438444 100644
--- a/tools/dom/idl/dart/dart.idl
+++ b/tools/dom/idl/dart/dart.idl
@@ -473,3 +473,12 @@ Element implements GlobalEventHandlers;
 interface CSSCharsetRule : CSSRule {
     [MeasureAs=CSSCharsetRuleEncoding] attribute DOMString encoding;
 };
+
+
+[DartSupplemental]
+interface EventTarget {
+    [DartSuppress] void addEventListener(DOMString type, EventListener? listener, optional (EventListenerOptions or boolean) options);
+    [DartSuppress] void removeEventListener(DOMString type, EventListener? listener, optional (EventListenerOptions or boolean) options);
+    [Custom] void addEventListener(DOMString type, EventListener? listener, optional boolean options);
+    [Custom] void removeEventListener(DOMString type, EventListener? listener, optional boolean options);
+};